package com.binarysearch;

import java.util.*;
import java.util.concurrent.ConcurrentHashMap;

public class Solution {
    public static void main(String[] args) {
        HashMap<Object, Object> hashMap = new HashMap<>();
        TreeMap<Object, Object> treeMap = new TreeMap<>();
        ArrayList<Object> list = new ArrayList<>();
        Hashtable<Object, Object> hashtable = new Hashtable<>();
        ConcurrentHashMap<Object, Object> concurrentHashMap = new ConcurrentHashMap<>();
        Arrays.asList();
        list.toArray();
        Collections.synchronizedList(new LinkedList<>());
    }
}
